factordbrpc · fdb
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Home prime · Base 20 of 1090 length 32 Not fully computed yet - the last known term is composite. ↓ .elf file
Show sequence-development graph
Term size (digits) across the sequence
How the sequence develops - decimal digits of each term vs iteration.
nStatus DigitsTermFactorization
12 Fully factored 14 3473415827…91<14> 97×107×127×1289×20443
13 Fully factored 17 1992054676…43<17> 1877×2736637×3878107
14 Fully factored 18 3845847447…07<18> 3×1281949149…69<18>
15 Fully factored 19 5043394914…69<19> 103×64793×280031×2698681
16 Fully factored 21 1694186812…81<21> 83×691×120889×24435339193<11>
17 Fully factored 22 2722577430…93<22> 557×33461×2698463×54133943
18 Fully factored 23 1825862898…43<23> 3×17×53×797×238529×35532241837<11>
19 Fully factored 27 4043977475…37<27> 3×1442056093…43<13>×9347711911…53<14>
20 Fully factored 28 6586789087…53<28> 3×13×1688920278…27<27>
21 Fully factored 30 1532609880…27<30> 3×5108699600…09<29>
22 Fully factored 31 2567669396…09<31> 281×2953×7583×4080639995…11<21>
23 Fully factored 32 1180148143…11<32> 3797×3108106777…63<28>
24 Fully factored 33 1592608309…63<33> 3×7×19×856571×4659858346…47<24>
25 Fully factored 35 2280472744…47<35> 29×179×233×1885462660…49<29>
26 Fully factored 36 1976286188…49<36> 11×250169×1538314550…89<13>×4668512326…99<17>
27 Fully factored 38 2973775725…99<38> 32×11×19×41×67×83299×29522569×2340274621…47<19>
28 Fully factored 43 1365751438…47<43> 19×22676629×3169856272…97<34>
29 Fully factored 43 8312618146…97<43> 32×29×16993×1874248906…89<37>
30 Fully factored 47 1083581860…89<47> 7×11×983×369979×19928007179<11>×1941674996…19<26>
31 Composite 50 1038508588…19<50> 3×2663194213<10>×1299828333…21<40>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (40 digits) of term #31:
1299828333372951968191738247711735698121
Check for factors - let the server run a small P-1 / P+1 / ECM step on the composite:
level 0 done · takes up to a minute
From the command linefdb · curl
fdb
fdb seq view '1090' --type 37 --part last20
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"sequence_view","params":{"start":{"expr":"1090"},"type":37,"part":"last20","fr":0}}'